Android Studio: grant permission between installing test APK and running tests with graphical test runner

I'm trying to automate the disabling of animations as described in this post, but that only seems to work for command-line invocation of connectedAndroidTest. I want to use the graphical test runner in Studio, with the list box showing passed/failed tests. With that runner, the permission grant (adb shell pm grant ... android.permission.SET_ANIMATION_SCALE) is never run, seemingly because the gradle task installDebugAndroidTest is never run, instead the runner is running Gradle as far as assembleDebugAndroidTest (or whatever alternate gradle task I specify in my run configuration), and then installing com.mypackage.test by some other (non-Gradle?) method immediately before running tests. So any prior permission grant is reset by that installation.

How can I grant SET_ANIMATION_SCALE between the graphical test runner's installation of the test package and the running of the test?